Pipe-wrench



E. WRIGHT. PIPE WRENCH.

(No Model.)

No. 562,878. Patented June 30, 1896.

' UNITED STATES PATENT OEFIcE.

EDW'ARD \VRIGHT, OF YVORCESTER, MASSACHUSETTS.

PIPE-WRENCH.

SPECIFICATION formingpart of Letters Patent No. 562,878, dated June 30,1896.

Application filed January 10, 1896. Serial No. 574,946, (No model.)

To alt whont 2125 may concern..-

Be it known that I, EDWARD WRIGHT, acitizen of the United States,residing at Worcester, in the county of \Vorcester and State ofMassachusetts, have invented a new and useful Improvement inPipe-Wrenches, of which the following, together with the accompanyingdrawings, is a specification sufficiently full, clear, and exact toenable persons skilled in the art to which this invention appertains tomake and use the same.

My invention relates to the novel construction, arrangement, and mode ofoperation of the sliding jawin combination with the fixed jaw andotherdevices in an adjustable screwwrench, as hereinafter explained, theobject being to render the wrench more efiicient, convenient, anddesirable and better adapted for screwing pipes and similar uses.

In the drawings, Figure 1 is a side view of my improved pipe-wrench.Fig. 2 is a back view; Fig. 3, a longitudinal sectional view, and Fig. 4is a top view of the movable jawcarrier.

In my improved wrench the parts are as follows:

A denotes the wrench-bar, having the head or fixed jaw A on its upperend and a suitable handle B at its other end.

0 indicates the screw with the rosette O- for adjusting the movable jaw.Said screw is constructed and disposed substantially as in thewell-known Goes wrench, with its rosette end sustained against the stepof the handle-ferrule B, as illustrated.

D indicates the movable jaw, having at its upper and lower ends strapsor bands (1 and d, that embrace the bar, retaining the jaw thereon witha suitable close sliding fit laterally, but with sufficient space at thefront and back to allow a limited backward and forward swing or rockingaction at the top or working end of said jaw. The interior of the jaw Dis chambered out, as at a, giving ample room for the screw 0 within theinterior thereof, but the j aw has no direct threaded engagement withthe screw. The shell of the jaw serves as a shrouding that covers andprotects the screw.

F indicates a jaw-sustaining carrier fitted with an opening a to slidedirectly upon the wrench-bar with a comparatively. close fit,

but with sufficient looseness to insure freedom of action also, havingathreaded opening'c, that properly fits and engages with theadjusting-screw C, so that said carrier is in threaded connection withsaid screw, to be shifted in either direction along the bar, accordinglyas the rosette is rolled under the thumb. At the back of the bar thecarrier is provided with an upwardly projecting tongue I, having aninwardly-hooked end 2', that interlocks with and loosely confines theband d or heel portion at the lower rear part of the movable jaw, asshown, so that the movable jaw will be moved along the barin connectiontherewith when the carrier is moved toward the handle.

The rear part of the carrier is extended along the back of the bar, asat f, to an extent approximately corresponding to the height of therosette. Said extension serves as a brace and support to preventdistortion or undue cramping on the screw when the wrench is exertingheavy strains. The top end surface of the carrier is slightly arched orrounded, as at 3, for serving as a rocker-seat for the jaw D, the lowerend of which latter may be straight or also slightly rounded, as at 4:,so that the working end of said jaw can have the desired swing movementtoward and from the bar for giving the grip to round pipe, the swingmovement being operative from about the point 5 of the seating-surfacesas a center.

A space m of about one-eighth inch, more or less, is provided betweenthe upper part of the jaw D and the front edge of the bar A to permitthe rocking of the jaw. A hole 6 is provided in the jaw, extendingforward from its rear edge just beneath the jaw-face, and within saidhole I arrange a coiled spring 7, and a spring-pressed pin or stud 9,the projecting end of which impinges against the front edge of the barA, and thereby tends to normally swing the jaw forward to the limit ofthe opening through the band d. The jaw-faces can be of well-knownform,toothed, or provided with detachable plates, as desired.

When the jaw is forced backward,the pressure on the pin 9 compresses thespring 7 and the pin recedes into the hole, and the rear end of thejaw-face, and lip 8 below the same, acts as a solid stop against the barand limits ICO a used.

In the operation, adjustment can be convenientlyeffcctcd by the screwand threaded carrienand the jaw has efiicient and ready I movement forgripping and releasing from the a for connected action, each providedwith the spring, and spring-pressed stud or pin,' arranged ina holeformed in said'movable jaw and acting against thefront edge of" the iWrench-bar, as set forth.

'vifitne'ss my hand this 7th day'of January 1399 w, EDY'VARI) \VRIGHT.

said jaw and carrier having adjacent abutsting end surfaces, on a planesubstantially Z perpendicular to the bar, but slightly rounded I toperinit'rocking of cneupcnthe other; the

partsbeing loosely retained together 'byzinterlocking lugs; said carrierbeing threaded for engaging withthe rosette-screw at the pipe Withoutliability of' crushing the pipe or becomingstuok thereon, while theparts of thewrenoh are such, as will not be liable to become cloggedwith dirt, or to otherwise get out of order by ordinary usage. o I

What I claim as myinvention herein, to be secured by Letters Patent, is-V a 1. In a wrench,in combination as described the movable jaw andjaw-carrier, arranged bands that embrace and slide upon the bar, the topbandadaptedforzpermitting and limiting a swinging movement of the jaw;

forward side of the bar, and said jaw having in its fore parta nonthreaded: chamberinto which the end of the screw is received,substantially as set forth. 1

adjusting-screw, and having the upwardlyprojecting inwardly-hookedtongue thereon; I

the internally-chambered movable jaw seated at itslower end to rock uponsaid carrier, and having upper and lower bands that embrace i the wrenchbar, the lower band being loosely confined beneath said hooked tongue,and

-Witne'sses: I e

OnAs.I-I.'BURLn1en, ELLA P. BLENUS."

2. Incombination Withthe Wrench-barhav-' ing the fixed jawthereon,andthe adjustingscrew arranged at the front of said bar, itsrosette=head adjacent to the handle the jaw- 2 supporting carrier fittedto slide upon the 1 wrench bar, inthreaded connection with said

